taylor



2 R 0 L Y A T W APPARATUS FOR THE MANUFACTURE OF CARBON BRUSHES. No.526,951.

Patented 001:. 2,1894.

Mme/eases v 0% Z f :rizns w. w bm-umh. wuumurau a c J. W. TAYLOR.APPARATUS FOR. THE MANUFACTURE OF UARBON BRUSHES.

' 2 Sheets-Sheet 2.

(No Model.)

No; 526,951. Patented Oct. 2, 1894.

II .II-

Wfiraess 8 fro en (T0 lwb' Carbon Brushes, of which the following is aUNITED STATES PATENT OFFICE.

JOHN W. TAYLOR, OF PETERBOROUGH, oANADA. I

APPARATUS FOR THE MANUFACTURE OF CARBON BRUSHES.

SPECIFICATION forming part of Letters mam... 526,951, dated October 2,1894. p

Application filed m 7,1894. serrate. 510,586. (N0 M1.)

To all whom it may concern: I

' Be it known that 1, JOHN WRIGHT TAY OR, of the town of Peterboroug h,in the county of Peterborough and Province of Ontario, Canada, haveinvented a certain new and Improved Apparatus for the Manufacture ofspecification.

The object of my invention is to devise a suitable apparatus for themanufacture of carbon brushes by means of which such brushes may beturned out ready for the market without requiring the expenditure ofextra labor after having been removed from the machine, and it consists,essentially, of a die barrel surrounded by a casing containing a steamchamber, a lower die at the bottom of the die barrel and an upper die towhich pressure may be applied by a suitable press, the whole beingconstructed in detail substantially as hereinafter more particularlydescribed and then definitely claimed.

Figure 1, is a perspective view of the apparatus. Fig.2, isacross-section of the die barrel and surrounding casing with the lowerdie in position. Fig. 3, is a bottom plan view of the casing with thelower part removed. Fig.

4, is a cross-section of the upper die showing in elevation the steaminlet and outlet pipes. Fig. 5, is a sectional plan of the same.

In the drawings, like letters of reference indicate corresponding partsin the different figures.

A, is the die barrel surrounded bya casing B, inclosing a steam chamber0. This casing is closed by the plate D, held in place by suit- 1 ablebolts. This plate also forms the bottom of the die barrel and has a holeformed therein for the passage of the rod E, connected to the lower dieF.

On reference to Fig. 3, it will be seen that the steam chamber 0, isdivided by a partition G, the inlet pipe H, entering on one side thepartition and the outlet pipe I, on the other so that the steam iscompelled to make a complete circuit of. the chamber 0, before it canescape.

The casing B, inclosing the die barrel is connected to the bed of thepress J, by means of bolts passing through lugs K, formed on oppositesides of the plate D. A plate L, is placed between the plate D, and thebed of the press J, to convey the pressure on the lower die to the bed'of the press- The press J, is placed on a suitable table or bench, and-on the floor beneath it is placed a treadle M, to which is connectedthe rod E, of the lower die plate.

N, is a spring adapted to retain the treadle M, in its normal position.

0, is the upper die, suitably connected to the spindle P, of the pressJ. A steam chamber is formed in this die by boring two holes Q, fromside to side of the die and closing their ends byscrew plugs R.Intersecting these holes at right angles are the holes S, T, U, alsoclosed by plugs It. From the top of the die holes are bored connectingwith the inner ends of the holes T, and U, and suitable nipples a, b,are screwed therein, to which nipples flexible steam inlet and outletpipes are'connected enabling the die to be effectually heated.

. A screw press J, is shown in the drawings, but it will of course beunderstood thata hydraulic or other press may be substituted for thatshown.

Having described the construction of the apparatus, I will brieflydescribe its operation'. The steam chambers in the casing B, and theupper dieare supplied with steam at a pressure'of about sixty pounds persquare inch. When the die and die barrel are sufficiently heated,asuitable quantity of the raw material hereinafterdescribed is placed inthe die barrel. The upper die is then closed down upon it, and the wholeleft-for a suitable length of time, generally about two minutes. Thepower of the press is then applied and the material properly compressedand amalgamated. The upper die being withdrawn by reversing the press,the compressed material forming the brush is removed from the die barrelby depressing the treadle M, which lifts the lower die and raises thebrush into a position to be removed. At least four presses arepreferably used, as, owing to the length of time necessary forthe'formation of a brush, one man can readily .attend to this number.When a sufficient number of brushes have been turned out in this way,they are subjected to the usual operations of burning andcopper-plating, and are then ready for the market.

ICO

p Aw Carbon brushes are now generally made from an intimately mixed andpulverized combination of coke andpitch. Of this mixture, which formsthe raw material of the 5 brushes, a suitable quantity is placed in alarge mold and after having a plate or upper die placed thereon, istaken to an oven and there heated to an extent sufficient to soften thepitch. After removal from .the oven, the mold is taken to a hydraulicpress and subjected to a pressure of about six thousand pounds to thesquare inch. The plate thus formed is then taken to a cutting machineand roughly cut into a number of:'

r 5 blocks somewhat larger than the size required for the finishedproduct. These blocks, after undergoing the operation of baking in thekiln, have then to be ground to thedesired shape by hand labor, whichinvolves a very 2o large addition to the cost of manufacture.

It is to avoid the necessity for this additional I do not of courseconfine myself to the manufacture of carbon brushes, asby enlarging thedie barrel and using suitably-shaped dies, the apparatus may be readilyadapted to the production of the carbon rods or pencils used in areelectric lamps, or of any other forms of manufactured carbon.

What I claim as my invention is- 1. Inan apparatus for the manufactureof 40 carbon brushes, the upper die 0, having holes Q, S, T, U, drilledtherein, in combination with plugs R, steam inlet a, and steam outlet19-, substantially as and for the purpose specified.

2. In an apparatus for the manufacture of carbon brushes, thecombination of thedie barrel A, casing 13, inclosing a steam chamber 0,surrounding the die barrel and provided with steam inlet and outletpipes H, and I; the lower die F, connected to the treadle M, by the rodE; the upper die 0, provided with a steam chamber and steam inlets andoutlets a, and b, for the same; and a press J, to the spindle of whichthe said upper die 0, is connected, substantially as and for the purposespecified.

Peterborough, April 27, 1894.

JOHN W. TAYLOR. In presence of- A. P. POUSSETTE, R. A. D. HAY.

